Hi George, I have 2 kessil a160s w goosenecks on 90cm aquascaper. 3 weeks in, running 6hrs w pressurised co2 and ro had the lights at 100%. Noticed some algae on glass now down to 60%. Can you advise on height and brightness? Without knowing par not sure how high/low they should be. Wood cast some shade & want the best for cuba & eleocharis p. Weekly waterc changes, ordered ei starter kit. Thanks, Marlon